Merge pull request #73 from per1234/update-link

Update Help Center article links

Author: pennam

README.md

@@ -49,7 +49,7 @@ espflash write-bin -b 115200 0x0 S3.bin
 
 ## Update your board
 
-To flash the firmware the board needs to be in `ESP download` mode. This can be done [manually](https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi#espflash) or using the [unor4wifi-updater](unor4wifi-updater) script.
+To flash the firmware the board needs to be in `ESP download` mode. This can be done [manually](https://support.arduino.cc/hc/en-us/articles/16379769332892-Restore-the-USB-connectivity-firmware-on-UNO-R4-WiFi-with-espflash) or using the [unor4wifi-updater](unor4wifi-updater) script.
 
 Alternatively you can also use the `download.sh` script to update the firmware using the `arduino-cli`. Also in this case the `download.sh` script
 should be invoked after putting the board in `ESP download` mode.

unor4wifi-updater/README.md

@@ -63,4 +63,4 @@ Disconnect and connect again your UNO R4 WiFi from your PC and re-run the script
 
 Follow the "**Run espflash directly**" instructions provided in this Arduino Help Center article:
 
-https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi#espflash
+https://support.arduino.cc/hc/en-us/articles/16379769332892-Restore-the-USB-connectivity-firmware-on-UNO-R4-WiFi-with-espflash